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node_modules/less/test/copy-bom.js 2.23 KB
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  /* jshint latedef: nofunc */
  
  // This is used to copy a folder (the test/less/* files & sub-folders), adding a BOM to the start of each LESS and CSS file.
  // This is a based on the copySync method from fs-extra (https://github.com/jprichardson/node-fs-extra/).
  
  module.exports = function() {
      var path = require('path'),
          fs = require('fs');
  
      var BUF_LENGTH = 64 * 1024;
      var _buff = new Buffer(BUF_LENGTH);
  
      function copyFolderWithBom(src, dest) {
          var stats = fs.lstatSync(src);
          var destFolder = path.dirname(dest);
          var destFolderExists = fs.existsSync(destFolder);
          var performCopy = false;
  
          if (stats.isFile()) {
              if (!destFolderExists) {
                  fs.mkdirSync(destFolder);
              }
              if (src.match(/\.(css|less)$/)) {
                  copyFileAddingBomSync(src, dest);
              } else {
                  copyFileSync(src, dest);
              }
          }
          else if (stats.isDirectory()) {
              if (!fs.existsSync(destFolder)) {
                  fs.mkdirSync(destFolder);
              }
              if (!fs.existsSync(dest)) {
                  fs.mkdirSync(dest);
              }
              fs.readdirSync(src).forEach(function(d) {
                  if (d !== 'bom') {
                      copyFolderWithBom(path.join(src, d), path.join(dest, d));
                  }
              });
          }
      }
  
      function copyFileAddingBomSync(srcFile, destFile) {
          var contents = fs.readFileSync(srcFile, { encoding: 'utf8' });
          if (!contents.length || contents.charCodeAt(0) !== 0xFEFF) {
              contents = '\ufeff' + contents;
          }
          fs.writeFileSync(destFile, contents, { encoding: 'utf8' });
      }
  
      function copyFileSync(srcFile, destFile) {
          var fdr = fs.openSync(srcFile, 'r');
          var stat = fs.fstatSync(fdr);
          var fdw = fs.openSync(destFile, 'w', stat.mode);
          var bytesRead = 1;
          var pos = 0;
  
          while (bytesRead > 0) {
              bytesRead = fs.readSync(fdr, _buff, 0, BUF_LENGTH, pos)
              fs.writeSync(fdw, _buff, 0, bytesRead);
              pos += bytesRead;
          }
  
          fs.closeSync(fdr);
          fs.closeSync(fdw);
      }
  
      return {
          copyFolderWithBom: copyFolderWithBom
      };
  };